Used Komatsu 4D94 Diesel Engine | 3.3L 4-Cylinder | Rebuilt for Excavators & Wheel Loaders
| Parameter | Specification |
|---|---|
| Engine Model | Komatsu 4D94 Series |
| Displacement | 3.3 Liters (approx. 179 cu in) |
| Configuration | Inline 4 Cylinder, 4-Stroke |
| Bore × Stroke | 94 mm × 100 mm |
| Power Output | 39 HP to 70 HP, depending on model and application |
| Aspiration | Naturally Aspirated or Turbocharged (varies by variant) |
| Fuel System | Direct Injection (some variants) / Indirect Injection |
| Cooling System | Liquid-Cooled |
| Dry Weight | Approximately 350-400 kg |
Are you looking for a replacement engine for your Komatsu excavator or wheel loader? This used Komatsu 4D94 diesel engine is a reliable choice for many types of construction equipment. The 4D94 is a four-cylinder, water-cooled, 4-stroke diesel engine. It has a displacement of about 3.3 liters. The cylinder bore measures 94 mm, and the stroke is 100 mm. This engine is widely used in Komatsu’s mid-sized machinery. We have professionally rebuilt this used engine to restore its original performance. It offers a cost‑effective way to keep your equipment running.
Technical Specifications
| Parameter | Specification |
|---|---|
| Engine Model | Komatsu 4D94 Series |
| Displacement | 3.3 Liters (approx. 179 cu in) |
| Configuration | Inline 4 Cylinder, 4-Stroke |
| Bore × Stroke | 94 mm × 100 mm |
| Power Output | 39 HP to 70 HP, depending on model and application |
| Aspiration | Naturally Aspirated or Turbocharged (varies by variant) |
| Fuel System | Direct Injection (some variants) / Indirect Injection |
| Cooling System | Liquid-Cooled |
| Dry Weight | Approximately 350-400 kg |
Key Features & Rebuild Quality
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Built for Construction Equipment: Komatsu designed this engine for mid-sized machines like excavators, wheel loaders, and bulldozers. It delivers strong torque at lower RPMs, which is what digging and lifting tasks require.
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Multiple Variants Available: The 4D94 engine comes in several versions. These include the 4D94E, 4D94LE, and 4D94-2 models. Some versions use direct injection for better fuel efficiency. Others use indirect injection for smoother cold starts. This means you can find the right fit for your specific machine.
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Proven in Komatsu Equipment: This engine powers many Komatsu models. It is found in the PC series excavators, WA series wheel loaders, and D series bulldozers. It has earned a strong reputation for durability in construction and mining applications.
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Complete Rebuild Process: We fully disassembled this used engine. We inspected the cylinder block and cylinder head. We serviced the fuel injection system and turbocharger if equipped. We replaced all critical wear parts with new components to meet original factory standards.
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Ready to Install: This engine ships as a complete unit. It comes with pre-installed filters and fluids. Necessary mounting hardware is included. This makes the installation process more straightforward. It helps reduce equipment downtime.
Value & Warranty
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Cost‑Effective Choice: This rebuilt used Komatsu engine costs much less than a new one. You get reliable power for your equipment at a fraction of the price.
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Warranty Included: We stand behind our rebuild work. This engine comes with a comprehensive warranty. Contact us for the specific terms.
Primary Applications
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Excavators: Direct replacement for Komatsu PC series mid-size excavators.
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Wheel Loaders: Suitable for Komatsu WA series compact and mid-size loaders.
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Bulldozers: Used in Komatsu D series dozer models.
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Industrial Equipment: Powers generators, pumps, and other stationary applications.
